Stitch-separating mechanism for sewing-machines.



No. 658,996. Patantu d on. 2, I900. i, m. u. PEARSON. 1 STITGH SEPABATING IIEGHANISMFOBSEWING MACHINES.

(Application filed May 8, 1900.) .(Nn-Iodel.) 8 Sheets-Sheet I.

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No. 658,996. Patented fl-Gt. 2, I900. M. H. PEARSON. STITGHSEPARATING MECHANISM FOR SEWING MACHINES.

(Application filed May 8, 1900.)

8 Shoots-Shoat 2.

- (No Model.)

No. 658,996. Patented Oct. 2, mu. m. n. PEARSON.

STITCH SEPARATING MECHAMSM FOR SEWING MACHINES.

, (A'ppiicatiol? filed May 3, 1900.) (No Model.) 8 Sheets-Sheet 3.

' No. 658,996. Patented Oct. 2, I900.

. m. H. PEARSON.

STITCH SEPABATING MECHANISM FOR SEWING-MACHINES.

(Application filed May 3, 1900.) (No Model.) 8 Sheots-Sheet 4.

ms nonms warms ca, wmauryoi, wAsnmomH. n :4

No. 658,996. PatIanted Oct. 2, I900.

m. H, PEARSON. STITCH SEPABATING MECHANISM FOR SEWING MACHINES.

(Application filed May 3, 1900.)

(No Model.) 8 Sheets-Shae! 5.

w: wams PETERS c0; mo'raumou wmnlnn'rou, a. c.

No. 658,996 Patented Oct. 2, I900. m. HLPEABSONL STITCH SEPARATING MECHANISIII'FOB SEWING MACHINES.

(Application filed May a; 1900 (lln Model.) B Sheets-Sheet 6.

J/MMM "m: nonms PETER; 0o. PHOYO-LITHQ. wunmsmu. u. c.

Patented Oct. 2, I900,

M. H. PEARSON. STITCH SEPABA'I'ING MECHANISM FOR SEWING MACHINES.

(Application filed May 8, 1900.)

8 Sheets-Sheet 7.

(No Model.)

No. 658,996. Patented Get. 2, I900.

10. H. PEARSON.

STITdH SEPARATING MECHANISM FOR SEWING MAGHI NES.

(Application filed May 8, 1900.)

(No Model.) 8 Sheats$hset 8.

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MARSHALL HENRY PEARSON, OF LEICESTER, ENGLAND, ASSIGNOR TO THE UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY.

STlTCH-SEPARATING MECHANISM FOR SEWING-MACHINES.

sPEoIFIoATIoN forming part of Letters Patent. No. 658,996, dated, October 2, 1900. Application filed May 3, 1900. Serial No.'15,3'74=. (No model.)

T at whom it may concern: Furthermore, according to my invention I Be it known that I, MARSHALL HENRY feed the work with the stitch setting orprick- PEARSON, a subject of Great Britain, residing-up devices, and I believe I am the first to ing at Union Works, Belgrave road, Leicesfeed the work by such devices. I have also 5 ter,in the county of Leicester, England,have improved sewing-machines of this class in invented certain new and useful Improveother respects, hereinafter described. ments in Sewing-Machines; and I do hereby To the above ends the present invention declare the following to be a full, clear, and consists in the devices and combinations of exact description of the invention, such as devices hereinafter described and claimed. to will enable others skilled in the art to which In the accompanying drawings, illustrating it appertains to make and use the same. the preferred form of my invention, Figures The present invention relates to an im- 1 and 1 are views which taken together show provementin sewing-machines,and more para sectional side elevation, Fig. 2 is a plan, ticul'arly to an improvement in sewing ma- 'Fig 3 is a rear elevation with the pulley re- I5 chines embodying stitch-forming mechanism moved, Fig. 4 is a partial sectional rear eleand stitch setting or pricking-up devices. vation, Fig. 5 is a partial sectional front ele- In so far as I am advised of the prior art, in vation, and Fig. 6 is apartial front elevation, such sewing-machines the Stitch has heretoof my machine. Fig. 7 is a top plan, Fig. 8 fore been tightened by the stitch-forming is a side elevation, and Fig. 9 is an end ele- 7o 20 mechanism and thereafter the stitch setting vation, of the shuttle. Fig. 10 is an isometor pricking-up devices engaged either one or ric view of the shuttle-carrier. Fig. 11 is an both sides of thestitch just completed and isometric view of the shuttle-carrier jointpressed and shaped itand then retreated from block. Figs. 12 and 13 illustrate certain dethe work, and the stitch-forming mechanism tails of construction hereinafter described. 25 operated to form the next stitch. The oper- Figs. 14, 15, and 16 are enlarged side elevaation of the stitch setting or pricking-up detion, bottom plan, and end elevation, respecvices upon the stitch compressed the leather tively, of the top pricking-up tool. Fig. 17 and incidentally loosened to some degree the is a transverse section' through the shuttlestitch. Furthermore, the Work was fed by carrier at line a b, Fig. 10, showing the joint- 30 the needle, by the awl, or by a ,feed surface, block in operative position therein. Figs.

and when stitch setting or pricking-up de- 18, 19, and 20 are enlarged plan, side elevavices were added thereto, increasing the numtion, and end elevation, respectively, of the her of parts operating directlyon the work, bottom pricking-up tool and its carrier; and difficulty was encountered, owing to the small Figs. 21, 22, and 23 are enlarged side elevay 5 space within which the operations of such tion, plan, and'end elevation, respectively,

parts were necessarily confined. of the tool-carrier slide.

The object of the present invention is to The frame A supports the main shaft B inreorganize and improve sewing-machines of snitablebearings therein. The pulley 0 conthis class, so as to remove the defects above stitutes a belt-wheel, by which the machine 40 noted. is driven, as well as a balance-wheel. A se- According to my invention after. the formries of cams D, E, F, and G are provided with ing and preliminary tightening of a stitch 'a series of cam pathsor grooves or cam-surand the application thereto of stitch setting faces by which the operative parts of the maor pricking-up devices and their'withdrawal chine are driven. 45 from the stitch the thread or threads are given In the machine of the drawings the needle 1 a further pull to again tighten the stitch, so cooperates with the shuttle 2 to form the as to make the seam perfect-1y tight, and I stitch. The needle is mounted on the neebelieve I am the lirst to apply a stitch-tightdle-bar l which is arranged to reciprocate in,v ening pull to the thread or threads after a bearings 1 1 in the frameA of the machine. [Q3 0 preliminary stitclrsetting operation of the The needle-bar is actuated by a link I, pivstitch setting or pricking-up devices. oted at 1 to a block secured to the needlebar 1 and at I to a pin secured in the end of a lever 1 which lever is mounted upon the stud 1 supported by the frame of the machine. The link 1 is actuated by a connecting-rod 1 pivoted to it at 1 and to the bell-crank needle-cam lever l at 1. One arm of the lever l carries a cam-roll l, which is received by the cam-groove 1 in the cam G, secured to the main shaft B of the machine. The above-described arrangement is such that the rotation of the cam-shaft imparts oscillating movements to the needle-cam lever 1 which in turn reciprocates the connecting-rod 1 and acinates the needle-bar 1 through the link 1 The shuttle 2 is an elongated substantially cylindrically-shaped hollow body provided at its rear end with a hinged closure 2, which is adapted to be opened for the insertion of the shuttle-bobbin 2 The upper part of the shuttle is provided with a flange 2, which extends forwardly beyond the end of the shuttle and is provided with a sharp edge adapted to engage the loop of thread drawn down by the needle and to open the same. One side of the front end of the flange 2 of the shuttle is cutaway, as at 2", through which recess after the shuttle has been moved forward to open the loop of thread drawn down by the needle the spreader-hook may pass to engage and open the loop of thread for the shuttle to pass through. The shuttle is provided with a tension-spring 2, which may be adjusted by means of the tension-adjusting screw 2 The shuttle-thread emerges from the shuttle through the slot 2 in its side, passes up through the slot 2 in the flange of the upper edge of the shuttle, down on the other side underneath the tension-spring, thence through the eye 2*, from which it leads to the work. The shuttle is operated by a shuttle-carrier 3, which consists of two parallel bars 3, a slotted block 3 which unites the two parallel bars 3 at one end, and the perforated block 3, which unites the parallel bars at the opposite end. The block 3 is slotted at 3 to receive the forwardly-projected end of the flange 2 of the shuttle and the spreader hook, hereinafter described. The perforated block 3 is provided with a cylindrical hole 3, which receives the jointblock 3 (see Figs. 11 and 17,) within which said joint-block fits and may be oscillated. The joint-block is provided with a hole 3 which is adapted to receive the end of the lever which operates the carrier to impart reciprocations thereto. The perforated block 3 is also provided with a hole 3, through which said operating-lever may pass. The shuttle-carrier is reciprocated by means of the shuttle-cam lever 3 (shown in dotted lines in Fig. 1",) which is pivoted at 3 to the frame of the machine and carries the cam-'roll 3*, which is engaged by the cam-groove 3 in the cam D, mounted on the main shaft B of the machine. The above-described arrange: ment is such that the cam-groove 3 through the shuttle-cam lever 3' imparts longitudinal reciprocations to the shuttle-carrier 3, which in turn reciprocates the shuttle in the shuttle-race 3". I

In connection with the shuttle I employ a spreader-hook 4, which after the point of the shuttle has entered the loop of thread drawn down by the needle engages such loop of thread and opens it to permit the shuttle to pass through. The spreader consists of a hook mounted upon the end of spreader-arm to which it is adj ustably secured by means of the screws 4; The spreader-arm 4 is projected forwardly from a sleeve 4, mounted upon a stud 4 fixedly supported upon the frame of the machine. Rearwardly projected from the sleeve 4 is an arm 4, which carries upon its extremity a cam-roll 4 which is received within the spreader-cam groove 4 of the cam G, mounted upon the main shaft B of the machine. The spreader-cam groove 4" and the shuttle-cam groove 3 are so timed with relation to each other that the hook of the spreader engages the needle-th read after the point of the shuttle has engaged it and separated it from the needle, and then it pulls down the needle-thread for the shuttle to pass through, after which the shuttle is moved to pass through said loop.

The presser-bar 5, provided with a presserfoot, (not shown,) is mounted in bearings 5 5 in the frame of the machine and adapted to reciprocate therein. The presser-bar is provided with a spline 5, which is projected outwardly through the groove 5 in the hearing 5. A spring 5 encircles the presser-bar and normally presses it downward to engage the work. Means are provided for locking the presser-bar in its position in engagement with the work and for lifting the presser-bar during the feed of the work. Loosely mounted upon the upper end of the presser-bar is a sleeve o through which the bar moves with an easy sliding fit. This sleeve 5 is provided with a hole therethrough perpendicular to the axis of the presser-bar, and said hole receives a stud 5 which is cut away to receive the presser-bar, as shown in dctailin Fig. 13. The stud 5 is provided with an arm 5 which is projected into a jaw 5 in the end of the lever 5 pivoted on the stud 5 supported on the frame of the machine. The stud 5 is secured in place by the set-screw 5. The lever 5- is pivotally connected at its opposite end at 5 with a connecting-rod 5", by which said lever 5 is operated. The connectingrod is pivoted at 5" to the bell-crank lever 5 pivoted at 5 to the frame of the machine. The other end of the bell-crank lever 5 carries the cam-r0115, which engages the pressercam groove 5 on the cam E, mounted on the main shaft B of the machine. The pressercain groove 5 through the medium of the bell-crank lever 5 the connecting-rod 5", and the lever 5 operates, after the presserbar has been forced down by the spring 5 into contact with the material, to tip the stud 5 to clamp it against the presser-bar to hold said bar in its position. A spring 5 mounted upon the presser-bar above the sleeve 5, bears at its upper end against the projection 5 on the frame of the machine and normally operates to press the sleeve downward. The presser-cam groove 5 and the above-described mechanism are arranged to hold the presser-bar against the material after it has been forced down by the spring 5 into engagement with the work and thereafter to lift the presser-bar while the material is fed. Then after the feed is completed the presserbar is again permitted to be pressed downward by its spring 5*.

The take-up 6 consists of a thread-truck 6 mounted on a take-up arm 6", secured to a rock-shaft 6, carried in suitable bearings 6 and b in the frame A of the machine. The take-up is supported in front of the head of the machine and actuated by suitable mechanism to exert a pull upon the needle-thread after the shuttle has passed through it to interlock the needle and shuttle threads, to draw the thread into the material to form the stitch, and to effect a preliminary tightening thereof, and subsequently after the stitch setting or pricking-up devices have first engaged and released the stitch thus formed in the manner hereinafter described the takeup (the needle and shuttle contributing to the result) makes a furtherpulling stroke on the thread to tighten the stitch and to draw it to its final position in the materials around the compressed materials. The mechanism for actuating the take-up consists of the arm 5 secured to the rock-shaft 6, to which arm the one end of the connecting-rod 6 is attached, the other end of the connecting-rod being attached to the take-up cam-lever 6 which is pivoted at 6 to the frame A of the machine. The lever 6 carries the cam-roll 6 which is operatedby the cam-groove 6 of the cam G, mounted on the main shaft B of the machine, the above arrangement and its operative relation to the stitch setting or pricking-up devices, hereinafter described, being such as to cause the take-up to exert a pull upon the thread after the shuttle has passed through the loop of needle-thread, to effecta preliminary tightening of the stitch, and after the stitch setting or pricking-up devices have engaged the stitch and compressed it and the intervening materials and have released themselves therefrom to cause it to exert a further pull on the thread to give the thread its final stitch-tightening pull to tighten the stitch in its final position in the seam.

While I have thus described the specific form of stitch-forming mechanism illustrated in the drawings, my invention is by no means specifically limited thereto.

My invention is capable of embodiment in a chain-stitch sewing-machine, as well as in a lock-stitch machine, and it is immaterial to my invention, considered in its broadest aspect, whether or notthe several pulls upon the thread before and after the stitch setting or prickingup devices have performed their function is exerted by the take-up, needle, and shuttle, or by either one alone, as my invention contemplates, broadly, cooperating mechanism for forming stitches arranged to exert stitch-tightening pulls upon the thread before and after the operation of the stitch setting or pricking-up devices.

The stitch setting or pricking-up devices consist in the machine of the drawings of two oppositely-disposed cooperating stitchengaging tools, which after the formation of a stitch by the stitch-forming mechanism engage the oppositely-disposed crowns of astitch and set or prick up the stitch, thereby imparting to the stitches a uniform and pleasing appearance. Moreover the lower tool pushes in the grain of the leather, which has been pushed out by the needle, and both of them compress and solidify the materials. After this stitch-setting operation of the two tools they are simultaneously released,,,and while the pres'ser-foot is still holding the work firm the final pull, above described, is given to the thread by the further movementof the needle and take-up upward and of the shuttle forward, the action being to again pull on the threads and to tighten them after the leather or other material has been compressed. This pulling upon the threads draws them home and holds the materials firmly together. These two tools then again drop onto the stitches, the presser-foot rises, and theleather is moved back by a simultaneously rearward movement of the top and bottom tools to the extent of the length of stitch desired, and these tools hold the stitch firmly compressed until the needle has again descended and risen and pulled another stitch into position.

Two sets or groups of mechanism operate the stitch setting or pricking uptools, the one for moving them toward and from the work comprising what may be termed mechanism for actuating the stitch setting or pricking up tools to set or prick up the stitches,

mechanism for actuatingthe tools to set or prick up the stitch, and will finally describe the mechanismfor actuating the tools to feed the work and the cooperative relation between the two groups of mechanism and the stitchforming mechanism, hereinbefore described. The top tool 7 consists of apiece of steel having a downwardly-extending work-engaging 'end, which is grooved transversely to the line of the seam, the groove being shaped to conform to the shape of the stitch. (See Figs. 14 and 16.) This tool is adjustably secured to the lower end of the pricker-bar 7 by a setscrew 7. The pricker-bar is mounted in bearings 7 and 7, secured to or integral with a slide 7, mounted upon a guide 7, secured to the front of the frame A of the machine. The pricker-bar 7 is provided with an outwardly-projected spline 7 engaging a groove 7 in the bearing 7, by which the pricker-bar 7 is held from rotation. The bottom tool 8 consists of a short stud or projection mounted on the slide 8, and which tool has a stitch-engaging end grooved transversely to the line of the seam and shaped to conform to the shape of the stitch. The tool 8 is secured to the slide 8 in the following manner: The tool is mounted upon a tool-carriertl which extends longitudinally of the slide, lying in a groove in the upper face thereof, and is held from longitudinal movement in said slide by the screw 8. The slide 8 is supported in bearings in the frame of the machine, extending over the shuttle-race, the slide 8 and toolcarrier 8 being provided with suitable holes 8 and 8, respectively, to permit the needle 1 to descend therethrough. The bottom tool 8 extends up through a'slot in the needle-plate 10, carried by the cover-plate 10 of the machine.

The above-dcscribed arrangement is such that the two stitch setting or pricking-up tools are supported upon opposite sides of the work in position to engage the stitch after the needle has retreated from the work, and which are capable of adjustment with relation to each other, so as to bring them into accurate opposition.

The mechanism for actuating the top tool to set or prick up the stitch and to lift it when required is as follows: The tool-bar 7 is surrounded by a coiled spring 7 which acts normally in a direction to force the tool-bar 7 down in contact with the work. The tool-bar 7 is provided above the bearing 7 with a barclamp lifting and locking device similar in all respects to the presser-bar lifting and locking device, hereinbefore described, and which therefore needs no repeated description at this point. The device for actuating the clamp of the tool-bar 7 is, however, different from that which operates the clamp 5, and in the following respect-s: that the end of the clamp 7 rests upon a lug or stud which when the stud is raised operates to operate the clamp to engage the tool-bar and to raise it therewith. Upon the descent of the lug or stud the clamp is released and the toolbar drops and forces the tool against the stitch to set it. The lug or stud above referred to is the stud 7 mounted upon the end of the arm 7 of the rock shaft 7', mounted in a bearing in the frame A of the machine. The rock-shaft 7 m is provided with another arm 7, to the end of which is pivoted the connecting-rod 7, extending down to the bell-crank lever 7, to one of the arms of which it is secured. The bell-crank lever 7 is secured to the rock-shaft 7, supported in bearings in the frame of the machine and Operated by means of the cam-lever 7, pivoted at 7 to the frame of the machine. The cam-lever 7 carries a cam-roll 7 upon one end, which engages the operating-cam surface 7 of the cam F, mounted on the main shaftB of the machine, The other end of the lever 7 carries a block, pivotally secured thereto, which engages a fork in one of the arms of the bell-crank lever 7 By this means the bell-crank lever 7 is actuated by the cam-lever 7. The mechanism for actuating the bottom tool to set or prick up the stitch and to lower it when required consists of an arm 8, mounted on the rock-shaft 7 which arm carries on its upper end the roll 8, upon which roll rests one end of the slide 8.

The above-described arrangement is such that the cam 7 actuates the two tools simultaneously from opposite directions, the top tool 7 through the bell-crank lever 7 the connecting-rod 7", the rock-shaft 7', the stud 7 the clamp-lever 7 the tool-bar 7, and the bottom tool through the arm 8 and roll 8, which latter directly supports the lower tool 8.

The mechanism for actuating the stitch setting or pricking-up tools to feed the work is as follows: The slides 8 and 7 are actuated from the feed rock-shaft 9, which carries two arms, which are connected to the two slides, respectively, the arm 9", engaging the slide 7 and actuating it and the arm 9 being connected to the slide 8 (by a universal joint) and actuating it. The points of application of the arms 9 and 9 with the slides 7 and 8 are equidistant from the rock-shaft 9, so that the two slides are. moved in accurate unison. The rock-shaft 9 is provided with an arm 9, which carries on its end a block 9 which is engaged and actuated by a groove 9 in a block 9 revolubly mounted in the arm 9 secured to the rock-shaft 9, to which rock-shaft the arm 9 is secured, which arm on its end carries a cam-roll 9 which engages the cam-groove 9 of the cam E, mounted on the main shaft B of the machine. Oscillations imparted to the rock-shaft 9 by the cam-groove 9 are imparted to the rock-shaft 9 through the medium of the arm 9 groove 9, block 9, and arm 9. The groove 9 in the block 9 is circularly curved, with a radius at the center line equal to the distance of the center line of the groove from the center of the rock-shaft 9 The arm 9 is provided with a segment 9, and the block 9 is provided with an arm 9*, which is projected from the block over the segment 9 and provided at its end with a springclip 9, adapted to engage the segment 9. When the block 9 is adjusted so that the center of curvature of the groove 9 coincides with the center of the rock-shaft 9 oscillations of the rock-shaft 9" will impart no motion to the rock-shaft, 9; but when the block 9 is so adjusted by moving the arm 9 along the segment'l9 that the center of curvature of the groove 9 does not coincide with the center line of the rock-shaft 9 then oscillations of the rock-shaft 9 will impart corresponding oscillations to the rock-shaft 9, and consequently correspondingreciprocations to the slides 7 and 8*,respectively. This device comprisesa feed-adjuster, by means of which the length of the strokes of the slides '7 and 8 are adjusted to the desired length of stitch. Thus it will be seen that the mechanism for actuating the stitchsetting or pricking-up tools to feed the Work is entirely independent of the mechanism for actuating the stitch setting or pricking-up tools to set or prick up astitch and that the length of the feed and the corresponding length of stitch is regulable.

'lhe cam 7 for actuating the stitch setting or pricking-up tools to set or prick up the stitch is so timed With relation to the timing of the cam-groove 9 which operates the mechanism for-actuating the stitch setting or pricking-up tools to feed the work and with relation to the cam-groove 6 for operating the lake-up (i, the can] 1 for actuating the needle, the cam 3 for actuating the shuttle, the cam for actuating the spreader, and the cam 5 for actuating the presser, that the operation of the stitch setting or pricking-up tools, the needle, the take up, the shuttle, the spreader,and the presser occur as follows: The needle descends and carries a loop of thread down through the material, the shuttle advances and enters the loop of thread so drawn down, the spreader engages theloop and opens it for the shuttle to pass through, the shuttle passes through, the needle retreats, the take-up rises, the shuttle-advances and the threads areinterlocked, and the stitch is formed and preliminarily tightened around the material. Then the stitch setting or pricking-up tools engage the stitch thus formed from opposite sides and simultaneously compress and form it and compress and solidify the leather or other material, the stitch setting or pricking-up tools are simultaneously released and the needle, shuttle, and take-up exert a further pull upon the threads to tighten them about the compressed and solidified material. Then the stitch setting or pricking-u p tools again drop onto thestitches, the presser-foot is released, and the leather or other materials is moved back by a simultaneous rearward movement of the top and bottom tools to the extent of the length of the stitch desired, and these tools hold the stitch firmly compressed until the needle has again descended and risen and pulled anotherstitch into position, thereby preventing the stitch from loosening itself until the next stitch is formed,wwhen it is held thereby in its tightpricking-up tools recede from the work, move forward to positions above and below the .stitchjust formed ,and again drop on the stitch and compress and shape. it to the desired form, theoperations thus described being successively repeated in the formation of a seam of stitches. It will be noted in this connection that the bottom stitch setting or pricking-np tool pushes in the grain of the leather which has been pushed out by the needle and compresses the leather under the stitches.

'The mot-ions of the presser-bar carrying the presser-foot, which engages and holds the material,are simply rising and falling motions, the foot being raised during the feeding of the work and dropped and locked to hold the work firmly in position during the time the needle and the other stitch-forming devices are operated to form the stitch and raised during the time the stitch setting or prickingup tools are feeding the work.

I have not shown herein in detail the form of the several cam paths, grooves, and surfaces, hereinbefore referred to, for the reason that having read the foregoing descrip-' tion of the form and arrangement of the several parts of the machine,of the drawings and their mode of operation, and the description of their correlative operation, any person of.

average skill in the art can readily develop said cam paths, grooves, and surfaces without the exercise of invention and with no greater skill than is possessed by the average skilled mechanic.

While I have described herein the preferred form of my invention, it is to be understood that my invention, in its broadest aspect, is susceptible of embodiment in various forms of mechanism. While I consider it preferable to employ two stitch setting or prickingup tools operating upon opposite sides of the st-itch'to compress and set it, I consider that my invention may be embodied in a machine employing but one stitch setting or prickingup tool cooperating with the stitch-forming mechanism to engage and compress a stitch and to release the pressure upon the stitch while the stitch-forming mechanism makes a further pull u pen the thread to fu rther tighten the stitch around the compressed leather or materials. While I consider that the illustrated embodiment of my invention contemplating the use of two stitch setting or pricking-up tools operating upon opposite sides of the stitch to feed the work after the complete formation of the stitch is the best construction, because each sustains the pressure of the other, I consider that my invention is susceptible of embodiment in a machine in which one stitch setting or pricking-up tool is employed which engages a stitch after it has been formed by the stitch-forming mechanism and compresses and shapes it,and it thereafter feeds the work the desired length for the next stitch. Furthermore, in case my invention was embodied in a machine ened position, whereupon the stitch setting or i for forming a chain-stitch by the use of a hooked needle it is obvious that one stitch setting or pricking-up tool can be employed in connection therewith, operating upon the single-thread side of the seam to shape and form the crowns of the stitches. My invention is not limited to a straight eye-pointed needle, but may be embodied in a straight or curved hooked needle sewingmachine whether of the chain-stitch or the lock-stitch type and with either one or two stitch setting or pricking-up tools, as may be desired. I may employ any suitable stitch setting or pricking-up tool or tools. as my invention is not limited to any particular form of such tool. In so far as I am advised of the state of the art, I am the first to make a sewingmachine embodying stitch-forming mechanism and stitch setting or pricking-up devices in which after the stitch is formed and after the application to the stitch of the stitch setting or pricking-up tools a further pull is exerted upon the thread by the stitch-forming mechanism. I am the first, so far as I am aware,to make a sewing-machine of the above type in which the work is fed by the stitch settingor pricking-up devices. I am the first, so far as I am aware, to make a machine of the above type in which the stitch setting or pricking-up devices operate more than once upon the stitch to shape and compress it to the desired form, and I am the first, so far as I am aware, to makea sewing-machine of the above type in which the stitch setting or pricking-up devices operate twice upon the stitch to shape and conform it to the desired form with an interval between the applications of such pressures during which the stitch-forming mechanism operates to make a further pull upon the thread to tighten the stitch around the material.

It is to be noted that in a machine embodying the present invention the stitch-forming mechanism first forms or produces the concatenation of thread,which is known as a stitch, without bringing the stitch to its final or completed shapeand position in the materials. This operation, through this specification and claims, I have uniformly described as the stitch-forming operation. I have used the expression stitch setting or pricking-up devices 'to describe the tools which engage and shape the stitch after it has been formed and before the stitch is tightened to its final position in the materials. I have used the expression to set or prick up the stitch to describe the operation performed by the stitch setting or pricking' up devices.

Having thus described my invention, I claim as new and desire to secure by Letters Patent of the United States-- 1. A sewing and pricking-up machine, having, in combination, stitch-forming mechanism, a stitch setting or pricking-up tool, the stitch-forming mechanism acting to form a stitch and to exert a further pull on the thread of the just-formed stitch after the operation thereon of the stitch setting or pricking-up tool,and means for actuating the parts, substantially as described.

2. Asewingand pricking-up machine, having, in combination, stitch-forming mechanism, astitch setting or pricking-up tool acting to feed the work, and means for actuating the parts, substantially as described.

3. Asewingand pricking-up machine, having, in combination, stitch-forming mechaln ism, astitch set-ting or pricking-up tool acting to set or prick up a stitch and thereafter to feed the work, the stitch-forming mechanism acting to form a stitch and to exert a further pull on the thread of the just-formed stitch after being set or pricked up by the stitch setting or pricking-up tool, and means for actuating the parts, substantially as described.

4. A sewing and pricking-u p machine, having, in combination, stitch-forming mechanism, a stitch setting or pricking-up tool, actin; to set or prick up a stitch and to withdraw therefrom, the stitch-forming mechanism acting to form a stitch and to exertafurther pull on the thread after the withdrawal of the stitch setting or pricking-up tool, and means for actuating the parts, substantially as described.

5. A sewing and pricking-up machine, having, in combination, stitch-forming mechanism, a stitch setting or pricking-up tool acting to set or prick up a stitch, to withdraw therefrom, and again to engage the stitch and feed the work, and means for actuating the parts, substantially as described.

6. A sewing and pricking-up machine, having, in combination, a stitch setting or pricking-up tool acting to set or prick up a stitch to withdraw therefrom and again to engage the stitch and feed the work, the stitch-forming mechanism acting to form a stitch and to exert a further pull on the thread of the just-formed stitch While the stitch setting or pricking-up tool is withdrawn from the work, and means for actuating the parts, substantially as described.

7. Asewing and pricking-up machine having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools operating upon opposite sides of a stitch, the stitch-forming mechanism acting to form a stitch and to exert a further pull on the thread of the just-formed stitch after the operation thereon of the stitch setting or pricking-up tools, and means for actuating the parts, substantially as described.

8. A sewing and pricking-up machine, having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools operating on opposite sides of a stitch and acting to feed the work,and means for actuating the parts, substantially as described.

9. Asewing and pricking-up machine, having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools operating on opposite sides of a stitch to set or prick it up and thereafter to feed the work,

the stitch-forming mechanism acting to form astitch and to exerta further pull on the thread of the just-formed stitch after being set or pricked up by the stitch setting or pricking-up tools, and means for actuating the parts, substantially as described.

10. Asewing and pricking-up machine,having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools operating on opposite sides of a stitch, acting to set or prick up a stitch and to withdraw therefrom, the stitch-forming mechanism acting to form a stitch and toexert afurther pull on the thread after the withdrawal of the stitch setting or pricking-up tools,and means for actuating the parts, substantially as described.

11. A sewing and pricking-up machine,having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools acting to set or prick up the opposite sides of a stitch to withdraw therefrom and again to engage the stitch and feed the Work, and means for actuating the parts, substantially as described.

12. Asewing and pricking-up tnachine,having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools operating on opposite sides of a stitch to set or prick up the stitch, to Withdraw therefrom and again to engage the stitch and feed thework, the stitch-forming mechanism acting to form a stitch and to exert a further pullon the thread of the just-formed stitch while the stitch setting or pricking-up tools are withdrawn from the stitch, and means for actuating the parts, substantially as described.

13. Asewing and pricking-upmachine, hav ing, in combination, stitch-forming mechanism comprising a take-up, a stitch setting or pricking-up tool, the stitch-forming mechanism acting to form a stitch and the take-up acting to exert a further pull on the thread of the just-formed stitch after the operation thereon of the stitch setting or' pricking-up tool, and means for actuating the parts, substantially as described.

14. Asewing and pricking-up machine, having, in combination, stitch-forming mechanism, comprising a take-up,-two stitch setting or pricking-up tools operating on opposite sides of a stitch, the stitch-forming mechanism acting to form a stitch and the take-up acting to exert a further pull on the thread of the just-formed stitch after the operation thereon of the stitch setting or pricking-up tools, and means for actuating the parts, substantially as described.

15. A lock-stitch-sewing and pricking-up machine, having, in combination, a needle, a shuttle, a takeup, a stitch setting or pricking-up tool, the needle, shuttle and take-up acting to form a stitch and to exert a further pull on the thread of the just-formed stitch after the operation thereon of the stitch setting or pricking-up tool, and means for actuating the parts.substantially as described.

16. A lock-stitch-sewing and pricking-up machine, having, in combination, a needle, a shuttle, a take-u p, two stitch setting or pricking-up tools operating on opposite sides of a stitch, the needle, shuttle and take-up acting to form a stitch and to exert a further pull on the thread of the just formed stitch after the operation thereon of the stitch setting or pricking-up tools, and means for actuating the parts, substantially as described.

17. A sewing'antl pricking-up machine,hav-

ing, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools for setting or pricking up the opposite sides of a stitch, and mechanism for simultaneously moving the tools to feed the work, substantially as described.

18. Asewingandpricking-up machine,having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools for setting or pricking up the opposite sides of a stitch, mechanism for simultaneously ad- I vancing the tools to set or prick up a stitch and mechanism for simultaneously moving the tools laterally to feed the Work, substantially as described. 7

19. Asewing and pricking-up machine, having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools for setting or pricking up the opposite sides of a stitch, two slides upon which such tools are mounted, and mechanism for moving the slides simultaneously to feed the work, substantially as described.

20. Asewing and pricking-up machine, having, in combination, stitch-forming mechanism, a stitch setting or pricking-up tool acting to feed the work, a feedadjuster, and means for actuating the parts, substantially as described.

21. Asewing and pricking-up machine, having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools for setting or pricking up the opposite sides of a stitch, two slides upon which such tools are mounted, a slide-actuating device having an arm, a rock-shaft having an arm provided with an adjustable slot adapted to engage the arm on the slide-actuating device, and means for oscillating the rock-shaft, substantially as described.

22. A sewing and pricking-up machine,having, in combination, stitch-forming mechanism, a stitch setting or pricking-up tool acting to feed the work, a slide upon which the stitch setting or pricking-up tool is tnonnted,a slideactuating device having an arm, a rock-shaft having an arm provided with an adjustable slot adapted to engage the arm on the slideactuating device, and means for oscillating the rock-shaft, substantially as described.

23. The combination with astitch setting or pricking-up tool acting to set or prick up the stitches of a seam and to feed the work,

of a presser acting to release the work during the feed, and means for actuating the parts, substantially as described.

24. The combination with two stitch setting or pricking-up tools operating on opposite sides of a stitch, of means for actuating the tools to set or prick up a stitch, and to feed the work, substantially as described.

25. Thecombination with twostitch setting or pricking-up tools operating on opposite sides of a stitch, of means for actuating the tools to set or prick up a stitch and to feed the work, and a presser to hold the work, substantially as described.

26. The combination with two stitch setting or pricking-up tools operating on opposite sides of a stitch, of means for actuating the tools to set or prick up a stitch and to feed the work, a presser to hold the work at all times except during the feed, and means for actuating the presser, substantially as described.

27. A sewing and pricking-up machine,having, in combination, stitch-forming mechanism, a stitch setting or pricking-up tool, the stitch-forming mechanism acting to form a stitch and to exert a further pull on the thread after the setting or pricking up of the stitch, and the stitch setting or pricking-up tool acting to hold the tightened stitch until after the next stitch is formed, and means for actuating the parts, substantially as described.

28. A sewing and pricking-up machine,having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools operating on opposite sides of a stitch, the stitch-forming mechanism acting to form a stitch and to exert a further pull on the thread I after the set-ting or pricking up of the stitch, and the stitch setting or pricking-up tools acting to hold the tightened stitch until after the next stitch is formed, and means for actuating the parts, substantially as described.

2! A sewing or pricking-up machine, having, in combination, stitch-forming mechanism, a stitch setting or pricking-up tool, acting to set or prick up a stitch and to feed the work, the stitch-forming mechanism acting to form a stitch and to exert a further pull on the thread after the pricking-up operation and before the feed, the stitch setting or pricking-up tool acting to hold the tightened stitch after the feed until the next stitch is formed, substantially as described.

30. A sewing or pricking-up machine, having, in combination, stitch-forming mechanism, two stitch setting or pricking-up tools operating on opposite sides of the work, acting to set or prick up a stitch and to feed the work, the stitch-forming mechanism acting to form a stitch and to exert a further pull on the thread after the pricking-up operation and before the feed, the stitch setting or pricking-up tools acting to hold the tightened stitch after the feed until the next stitch is formed, substantially as described.

In testimony wherwf I affix my signature in presence of two witnesses.

MARSHALL HENRY PEARSON.

Vitnesses:

S. S. PARTRIDGE, WALTER W. BALL. 

